Comment 68 for bug 549447

Benjamin,
quote
"the touchscreen works, but the axes are swapped; going from left to right on the screen, moves the cursor from top to bottom)
If I swap the axes (xinput set-int-prop <device_id> <prop_id> 8 1), the axes are swapped, but then the cursor jumps away a lot, I think to the center of the top and bottom, it's hard to see where exactly."

I'm having this same exact problem and haven't manage to defeat it trying everything suggested here. Have you had any luck? The cursor behaves fine but with inverted axis, but using calibrator makes the cursor track the touch but jump wildly to some other point and back... selecting things randomly. Any change using xinput seems to bring about this randomly selecting behaviour...
I'm also on egalax usb touchscreen...natty.

Thomas Overton